wp timepicker

function kv_time_js() {
    wp_register_style('kv_js_time_style' , KV_PLUGIN_URL. 'css/jquery.timepicker.css');
    wp_enqueue_style('kv_js_time_style');   
    wp_enqueue_style('jquery-style', 'http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/themes/smoothness/jquery-ui.css');

    wp_enqueue_script('jquery-time-picker' ,  KV_PLUGIN_URL. 'js/jquery.timepicker.js',  array('jquery' )); 
} 

add_action('admin_head', 'kv_time_js');

using

<script>  
    jQuery(document).ready(function() { 
        jQuery('#kv_demo_time_picker').timepicker({ 'timeFormat': 'H:i:s'});
    });
</script>

download source _http://cdn.kvcodes.com/zip/jQueryTimePicker-KvVaradha.zip source _http://www.kvcodes.com/2014/02/how-to-add-the-jquery-timepicker-to-wordpress-admin/